I noticed this growing near my crepe myrtle tree. And I can't seen to identify it.

Hi Renee, and welcome to Garden.org We really need to know where you are to make a guess on the ID of that plant. Your location (city, state, country?) will narrow the possibilities a lot. Just go to your personal profile and fill that in - it's the little person icon in the blue sidebar to the left.

If you could also give us a little more info on the plant other than the seed pod - a picture of the whole plant would be tremendously helpful. Leaves, plant size, location in sun or shade, etc. all will help figure out who it is.

Certainly a member of the pea family.
The seed pods looks a lot like a Vicia species, all depends of course like Elaine says what the location is the plant is growing and photos of the whole plant, leaves and possibly flowers would help determing which species it is.
https://www.google.be/search?q...

This is the seed pod of Vicia benghalensis as an example..